Anyone recognize this mark?

[Aaronrob89]

Does anyone recognize this mark? Also is it a safe assumption that these are older akoyas? 7mm very few flaws. 19 inches

 

[Pearl Dreams]

Two of those pearls don't look fully round. Based on shape and that photo alone, I'd say they are freshwaters.
However, that off-roundness could just be a camera effect. Please post a photo showing all the pearls.

I don't recognize the shield shaped mark.

 

[BWeaves]

I think is the maker of the clasp, not the maker of the necklace. You can buy clasps of the sort for any necklace.